In a new video from the event — held to honor the victims and survivors of the May 22 terrorist attack in Manchester — Perry preps for the show and rehearses her acoustic rendition of “Part of Me.” We also see her dance backstage and mingle with fellow superstar performers. She takes a selfie with Niall Horan, goofs off with Miley Cyrus, and hugs Justin Bieber, who tells her, “It’s awesome that you’re here, doing this.”

The video also gives us a backstage view of Perry’s performance, as well as a closer look at her incredible dress, which was printed with the faces of the 22 people killed outside Manchester Arena. And in the video’s sweetest moment, Perry and Grande share a long, emotional hug backstage. That kind of love and solace is what the day was all about, after all.